Gtjn sight



* 33-258a 0: 2 199119770 SR May J. H. REDFIELD 1,911,770

GUN S IGHT Filed Sept. 29, 1930 539 & gwue'nl oc Y r M a Patented May30, 1933 JOHN H. REDFIELD, OF DENVER, COLORADO GUN SIGHT Applicationfiled September 29, 1930. Serial No. 485,023.

This invention relates to a gun sight, more particularly to the type ofsight known as a receiver sight, that is, one arranged to be attached tothe receiver of a rifle. The

principal object of this invention is to provide a receiver sight whichcan be easily and securely attached to a rifle without the necessity ofdrilling or tapping new holes or notching or defacing the rifle orstock.

Another object of the invention is to so construct the sight that itcannot become misplaced or loosened by the recoil of the rifle.

A further object of the invention is to provide means which will allowthe sight to be manually moved to any desired vertical adjustmentwithout danger of its slipping from this adjustment while being lockedin lace.

A still further object of the invention is to provide a novel windage orlateral adjustment by means of which a minutely accurate windageadjustment can be easily made and permanently maintained.

Other objects and advantages reside in the detail construction of theinvention which is designed for simplicity, economy,

and efliciency. These will become more apparent from the followingdescription.

In the following detailed description of the invention reference is hadto the accompanying drawing which forms a part hereof. Like numeralsrefer to like parts in all views of the drawing and throughout I thedescription.

In the drawing: Fig. 1 illustrates the receiver portion of a typicalrifle before the improved sight is applied thereto.

Fig. 2 illustrates the rifle with the improved sight in place thereon.

Fig. 3 is an outside elevation of the improved sight.

. Fig. 4 is a rear elevation thereof.

through the sight sleeve illustrating the action of the windageadjustment.

Typical parts of a rifle are indicated by numeral in the drawing asfollows: receiver 10; magazine side plate 11; side plate attachmentScrew 12; magazine cut off lever 13; and stock 14. The invention isapplicable to any type of rifle having a receiver. The rifle illustratedis of the type known as a Krag. The Krag rifle is provided with aninjector locking lever positioned as shown at 13. This lever is toconvert the rifle from a repeater into a single shot gun. It is seldomif ever that a hunter desires to dispense with the repeating feature ofhis rifle. Therefore, the lever 13 is rarely if ever used. To apply thisimproved sight to a gun of this type the magazine cut off lever 13 withits stem is removed leaving the stem hole exposed, as shown at 15. Themagazine plate screw 12 is also removed.

The invention comprises a base block 16, the inside face of which iscontoured as shown in Figs. 4 and 5 to fit over and around the receiver10, the magazine plate 11, and the stock 14. The block 16 is drilled, asshown at 17 to provide an opening for the plate attachment screw 12.

A recoil shoulder or clip 18 is secured to the rear face of the block 16by means of a suitable screw 19, one edge of this clip is turnedinwardly to fit into a vertical groove 20 milled in the block 16. Theextremity of the clip 18 carries an inwardly projecting tongue 21 which,when the device is 1 lin place, fits into the stem hole 15 of the r1 e.

The tongue 21 is preferably formed by turning the extremity of the clip18 inwardly and forming it on a slight are as shown in Fig. 4 to conformto the diameter of the stem hole 15.

The sight is positioned on the rifle, such as the one shown in Fig. 2,by first engaging the tongue 21 into the stem hole 15 then swinging theblock 16 against the receiver 10 and stock 14 and securing it in placethereon by means of the magazine plate screw 12 or by a similar screwreplacing the usual plate screw 12.

A vertical groove is milled in the outside face of the block 16 toslidably receive a leg 22 depending from a bridge member 23. The leg 22fits snugly in its slot so as to avoid any rocking motion and ismaintained therein by means of a set screw 24, the stem of which passesthrough a vertical slot 25 in the leg 22.

It is desired to call attention to the fact that a leaf spring, hereindesignated the vertical adjustment retaining spring 26, see Fig. 7, isplaced under the head of the screw 24 and against the vertical leg 22.This spring is provided with a hole 31 for the screw 24 and has a widthsubstantially equal to the slot for the leg 22. The edges of this slottherefore maintain it in a vertical position.

The retaining spring 26 is formed with a slight bow so that itsextremities will resiliently engage the leg 22 when the set screw 24 isslightly loosened. This allows the leg to be raised or lowered by handand accurately adjusted to the desired position and maintains it in thisposition until the set screw 24 is tightened to permanently fix it. Theface of the leg 22 may carry a series of graduations as illustrated toshow the extent of the vertical adjustment.

The bridge member 23 supports a sight sleeve 27 which is internallythreaded to receive any desired sight such as the disk sight illustratedat 28. The sight sleeve 27 is provided with two outwardly extendinginclined shoulders 29, each of which is bifurcated to pass around anadjustment screw 30. The adjustment screws 30 are threaded into thebridge member 23 at an angle corresponding to the face angle or inclineof the shoulders 29 so that the heads of the screws 30 will rest flatagainst these faces.

Let us assume the sighting sleeve is in the solid line position of Fig.8 and that it is desired to move it to the left or broken line position.This can be accomplished by loosening the left hand screw 30 to thebroken line position and then tightening the right hand screw 30 so thatits head will slide down the inclined plane of the right hand shoulder29 and gradually wedge or squeeze the sight sleeve 27 to the left untilthe left hand shoulder has contacted with the underside of the head ofthe left hand screw 30. Further tightening of the left hand screw 30securely clamps the sleeve 27 in place.

Thus it can be seen that the screws 30 serve a double purpose. First,they act as an adjustment and stop to move the sighting sleeve to theright or left any desired distance. Second, they act as clamp screws tofirmly clamp the sighting sleeve in any desired position.

It is desired to call attention to the recoil clip 18. This also servesa double purpose.

First, its hook 21 maintains the base block 16 against the receiver.Second, it extends across the rear face of the receiver so as totransmit the rearward recoil shock of the rifle directly to the baseblock 16 and relieve the attachment screw 12 of any lateral strains.Thus, the recoil clip 18 serves to prevent shearing or loosening of thescrew 12 by the continual recoil shocks to which any sight is subjected.

While a specific form of the improvement has been described andillustrated herein, it is desired to be understood that the same may bevaried, within the scope of the appended claims, without departing fromthe spirit of the invention.

Having thus described the invention, what is claimed and desired securedby Letters Patent is 1. A gun sight comprising: a base block adapted tobe secured against the receiver of a rifle; sighting vmeans supported bysaid base block; a hooked member carried by said base block so as toextend inwardly behind said receiver and forwardly into a rearwardlyopening hole in said receiver; and means for securing said base block inplace when said hooked member is in engagement with said hole.

2. Means for securing a sight upon a rifle receiver of the type having arearwardly opening hole and a sidewardly opening hole, comprising: abase block; a clip secured to the rear face of said block; inwardlyturned extremities on said clip, one of said extremities fitting into agroove in said block, the other extremity fitting into said rearwardlyopening hole and a screw passing through said block and adapted toengage the sidewardly opening hole.

3. In a gun sight, means for holding a vertically slidable member in anydesired vertical position comprising: a base block provided with avertical groove for receiving said slidable member; a set screw threadedinto said base block through a vertical slot in said slidable member;and a longitudinally extending leaf spring adapted to be clamped againstthe outer face of said slidable member by said set screw, the groove insaid base block being sufficiently deep so that the sides thereof willextend beyond said slidable member and maintain said spring in alignmentwith said slidable member.

4. In a gun sight, means for holding a vertically slidable member in anydesired vertical position comprising: a base block provided with avertical groove for receiv ing said slidable member; a set screwthreaded into said base block through a vertical slot in said slidablemember; and a longitudinally extending leaf spring adapted to be clampedagainst the outer face of said slidable member by said set screw, thegroove in said base block being sufliciently deep so 33. GEOMETFHCALINSTRUMENTS ture.

JOHN H. REDFIELD.

M H uw

